at one of our 10,000 offices. call 1-800-hrblock. i'm a dad, coach... and i quit smoking with chantix. knowing that i could smoke during the first week was really important to me. [ male announcer ] along with support, chantix is proven to help people quit smoking. chantix reduced my urge to smoke -- and personally that's what i knew i needed. [ male announcer ] some people had changes in behavior, thinking or mood, hostility, agitation, depressed mood and suicidal thoughts or actions while taking or after stopping chantix. if you notice any of these, stop taking chantix and call your doctor right away. tell your doctor about any history of depression or other mental health problems, which could get worse while taking chantix. don't take chantix if you've had a serious allergic or skin reaction to it. if you develop these, stop taking chantix and see your doctor right away as some can be life-threatening. if you have a history of heart or blood vessel problems, tell your doctor if you have new or worse symptoms. get medical help right away if you have symptoms of a heart attack. use caution when driving or operating machinery. common side effects include nausea, trouble sleeping and unusual dreams. these are the reasons i quit smoking.